acinar cells
Functional classification of exocrine glands is based on the type of secretion they produce and their mode of secretion. They can be categorized into three main types: serous glands, which secrete a watery, enzyme-rich fluid; mucous glands, which produce a thick, viscous secretion; and mixed glands, which can produce both types of secretions. Additionally, the mode of secretion can further classify them as merocrine (via exocytosis), apocrine (where part of the cell cytoplasm is lost), or holocrine (where the entire cell disintegrates).
Holocrine
apocrine
G cells in the stomach lining secrete gastrin hormone. This hormone helps in the regulation of gastric acid secretion and motility in the stomach.
epithelial tissue
Functional classification of exocrine glands is based on the type of secretion they produce and their mode of secretion. They can be categorized into three main types: serous glands, which secrete a watery, enzyme-rich fluid; mucous glands, which produce a thick, viscous secretion; and mixed glands, which can produce both types of secretions. Additionally, the mode of secretion can further classify them as merocrine (via exocytosis), apocrine (where part of the cell cytoplasm is lost), or holocrine (where the entire cell disintegrates).
Unicellular exocrine glands are certain cells that are specialized for secretion. Even though they are single cells and have no ducts, they are still considered to be exocrine because they secrete their products directly to a specific site. The most common unicellular exocrine glands are the goblet cells that secrete mucus in the epithelium of your trachea and digestive tract.
Lactation is a specialized form of secretion known as exocrine secretion. It involves the production and release of milk from mammary glands in response to hormonal stimulation, primarily by prolactin and oxytocin. This milk serves as a nutrient-rich substance to nourish infants, providing essential proteins, fats, vitamins, and antibodies.
The most common type of exocrine glands are the sweat glands. These glands are found throughout the body and are responsible for producing and secreting sweat to help regulate body temperature.
Holocrine
The Golgi apparatus is found in eukaryotic cells. It will be more pronounced in cells involved in secretion.
apocrine
Apocrine glands have portions of cells containing secretions pinched off from the main cell body. When these pinched-off portions are released, they contain the secretions produced by the cell.
Paracrine secretion enters the interstitial fluid and affects neighboring cells in the same tissue. It plays a role in local signaling between cells within a specific tissue or organ.
Holocrine glands are the type of secretion that undergo mitosis and rupture. The cells accumulate secretory products until they burst and release their contents. Examples include sebaceous glands in the skin.
the pancreas is a single organ, which spits into two limbs in the dog. it consists of 2 types of cells. one type which make hormones such as insulin (the endocrine cells of the pancreas) and another type of cells that make digestive enzymes for excretion into the gut (the exocrine cells of the pancreas).
Simple columnar epithelium is the type of epithelium designed for absorption and secretion found throughout much of the gastrointestinal tract. It is characterized by tall, closely packed cells that have microvilli to increase surface area for absorption and goblet cells for secretion of mucus.